/* *****************************************************************
 *
 * Copyright 2016 Microsoft
 *
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 ******************************************************************/

#ifndef GETOPT_H__
#define GETOPT_H__
#include <cstring>


char* optarg = NULL;
int optind = 1;

int getopt(int argc, char* const argv[], const char* optstring)
{
    if ((optind >= argc) || (argv[optind][0] == 0))
    {
        return EOF;
    }
    if ((argv[optind][0] != '-'))
    {
        return '?';
    }

    int opt = argv[optind][1];
    const char* p = strchr(optstring, opt);

    if (p == NULL)
    {
        return '?';
    }
    if (p[1] == ':')
    {
        optind++;
        if (optind >= argc)
        {
            return '?';
        }
        optarg = argv[optind];
        optind++;
    }
    else
    {
        optind++;
    }
    return opt;
}

#endif
